Cheng was optioned to Triple-A Worcester after Sunday's 6-1 win over the Blue Jays, Chris Cotillo of MassLive.com reports.
Cheng will head down to Triple-A to make room for Curtis Mead's activation ahead of Mead's debut with Boston on Monday. Cheng posted a .256 average with a double, five RBI and seven runs scored over 39 at-bats in 14 contests with the Red Sox following his promotion June 26, and he will likely get another shot with the big-league club relatively soon.